Marie Dominique Giraudo

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Five experiments using a visuospatial task were conducted to study memory accuracy and variability and to identify the origin of variations in steady states. This research was conducted from a dynamical perspective, that is, by analyzing the temporal course of discrepancies between the perceptual configuration and its memory (accuracy) and the temporal(More)
Two experiments addressed the question of the spatial deficits of Parkinson disease (PD) patients, using a spatial location task which varied the characteristics of the task along an effortful continuum. In the more effortful task, 11 PD patients, 10 elderly control subjects, and 13 young control subjects were given 3 min to learn the layout of 12 places(More)
We recorded the paths of subjects who walked along a memorized hexagonal route without vision, and studied the impact of previous mental simulation of this activity on how well the path could be reproduced from memory. We compared two kinds of mental simulation to actual physical practice, rest, or simple memorization of the path. The results indicated that(More)
We recorded the paths of subjects who walked along a memorized hexagonal route without vision, and studied the impact of previous mental simulation of this activity on how well the path could be reproduced from memory. We compared two kinds of mental simulation to actual physical practice, rest, or simple memorization of the path. The results indicated that(More)
Classically, memory has been defined as the preservation in time of internal representations called mental images (Cooper 1976; Finke and Kosslyn 1980; Finke and Kurtzman 1981; Shepard 1978). An extensive body of literature has been devoted to understanding the processes allowing for stabilization of these mental images. It is noteworthy that nearly all(More)
Considering the dynamics of image stabilization, Giraudo and Pailhous (1999) asked participants to reproduce a complex, noisy visuospatial pattern several times in succession. Subjects were shown to experience difficulty stabilizing the image in memory up until the point the disturbance induced by the presentation of the variable pattern ended. At that(More)
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